Sheet cleaning device and method

Abstract

A sheet cleaning device and method is provided. The sheet cleaning device includes a soak unit, a cleaning solution cleaning unit, a water cleaning unit, a drying unit, and a conveying member. The soak unit is configured to accommodate a soak solution and a sheet so that the sheet is subjected to static cleaning of the soak solution; the cleaning solution cleaning unit is configured to rinse the sheet with a cleaning solution; the water cleaning unit is configured to rinse the sheet with water; and the drying unit is configured to perform drying treatment to a cleaned sheet. The conveying member is configured to receive a soaked sheet from the soak unit and convey the soaked sheet through the cleaning solution cleaning unit, the water cleaning unit, and the drying unit, in order.

The invention claimed is: 
     
       1. A sheet cleaning device comprising:
 a soak unit configured to accommodate a soak solution and a sheet such that the sheet is subjected to static cleaning by the soak solution, 
 a cleaning solution cleaning unit configured to rinse the sheet with a cleaning solution, 
 a water cleaning unit configured to rinse the sheet with water, and 
 a drying unit configured to perform a drying treatment to the sheet after rinsing, 
 wherein the sheet cleaning device further comprises a conveying member, which is configured to receive a soaked sheet from the soak unit, and convey the soaked sheet through the cleaning solution cleaning unit, the water cleaning unit, and the drying unit, successively, 
 wherein the cleaning solution cleaning unit, the water cleaning unit and the drying unit are stacked successively in a vertical direction from bottom to top to form a columnar structure, each of the cleaning solution cleaning unit, the water cleaning unit, and the drying unit comprising a tank that spirals upwards around a center of the columnar structure, such that the cleaning solution cleaning unit, the water cleaning unit, and the drying unit as a whole exhibit a spiral columnar structure. 
 
     
     
       2. The sheet cleaning device according to  claim 1 , wherein the conveying member comprises one of a guide rail or conveying belt that spirals upwards along a top of the tank of each of the cleaning solution cleaning unit, the water cleaning unit, and the drying unit. 
     
     
       3. The sheet cleaning device according to  claim 1 , wherein the sheet further comprises a transfer sheet. 
     
     
       4. The sheet cleaning device according to  claim 2 , wherein tanks of the cleaning solution cleaning unit, the water cleaning unit, and the drying unit are independent of each other, and the top of each of the tanks comprises an opening. 
     
     
       5. The sheet cleaning device according to  claim 4 , wherein the soak unit comprises a plurality of soak tanks, wherein each of the plurality of soak tanks is separate from each other, and each of the plurality of soak tanks is used for accommodating the soak solution and the sheet. 
     
     
       6. The sheet cleaning device according to  claim 5 , wherein an ultrasonic generator is disposed in the plurality of soak tanks. 
     
     
       7. The sheet cleaning device according to  claim 5 , wherein the soak unit further comprises an elevating mechanism for raising the sheet from the soak unit to be provided to the cleaning solution cleaning unit. 
     
     
       8. The sheet cleaning device according to  claim 4 , wherein the tank of the cleaning solution cleaning unit includes a first high pressure nozzle for spraying the cleaning solution onto the sheet when the sheet passes through the opening of the tank of the cleaning solution cleaning unit. 
     
     
       9. The sheet cleaning device according to  claim 8 , wherein the tank of the water cleaning unit includes a second high pressure nozzle for spraying water onto the sheet when the sheet passes through the opening of the tank of the water cleaning unit. 
     
     
       10. The sheet cleaning device according to  claim 9 , wherein the cleaning solution cleaning unit and the water cleaning unit each further comprises a support plate fixed above the conveying member, the support plate being used for supporting the sheet conveyed by the conveying member to resist an impact force from the first high pressure nozzle or the second high pressure nozzle. 
     
     
       11. The sheet cleaning device according to  claim 10 , wherein at least one of the cleaning solution cleaning unit and the water cleaning unit includes a roller brush, the roller brush being fixed below the conveying member so that the sheet is subjected to brushing by the roller brush while being conveyed by the conveying member through the roller brush. 
     
     
       12. The sheet cleaning device according to  claim 10 , wherein the drying unit includes blowing members fixed above and below the conveying member. 
     
     
       13. A method for cleaning a sheet using the sheet cleaning device according to  claim 1 , comprising:
 soaking the sheet in the soak solution in the soak unit to allow the sheet to be subjected to static cleaning by the soak solution, and 
 conveying the sheet using the conveying member successively through the cleaning solution cleaning unit, the water cleaning unit and the drying unit successively. 
 
     
     
       14. The method according to  claim 13 , wherein the cleaning solution cleaning unit, the water cleaning unit and the drying unit are stacked successively in a vertical direction from bottom to top to form a columnar structure, the cleaning solution cleaning unit, the water cleaning unit and the drying unit each comprise a tank that spirals upwards around a center of the columnar structure so that the cleaning solution cleaning unit, the water cleaning unit, and the drying unit as a whole exhibit a spiral columnar structure, a top of each tank has an opening, the tank of the cleaning solution cleaning unit comprises a first high pressure nozzle for spraying the cleaning solution onto the sheet when the sheet passes through the opening of the tank of the cleaning solution cleaning unit, the tank of the water cleaning unit comprises a second high pressure nozzle for spraying water onto the sheet when the sheet passes through the opening of the tank of the water cleaning unit, and the drying unit comprises blowing members fixed above and below the conveying member, wherein the method further comprises:
 opening the first high pressure nozzle in the cleaning solution cleaning unit in response to the sheet reaching the cleaning solution cleaning unit, 
 opening the second high pressure nozzle in the water cleaning unit in response to the sheet reaching the water cleaning unit, and 
 activating the blowing members in response to the sheet reaching the drying unit.